The relationship between fracture toughness and notch toughness, tensile ductilities in lath martensite steel has been investigated.
研究了超高强度板条马氏体钢的平面应变断裂韧性与缺口韧性、拉伸塑性之间的关系。
The results indicated that the steel is composed of quasi bainite, lath martensite and twin martensite under air cooling condition, and also has better combination of strength and toughness.
试验表明：该钢空冷条件下即可获得准贝氏体、板条马氏体及孪晶马氏体的复合组织，且具有较好的强韧性配合。
The morphology and crystallography analysis of lath martensite within a packet in 17CrNiMo6 steel was studied by electron backscattering diffraction(EBSD) with field emission gun.
利用电子背散射衍射（EBSD）技术和TEM分析方法研究了17CrNiMo6钢中一个形态上的packet内的板条马氏体的形态与晶体学特征。
The results show that there are four kinds of carbides in annealed state of the steel, and major portion of quenched martensite is lath-like martensite.
结果表明，该钢退火状态存在四种类型碳化物，淬火组织以板条马氏作为主。
When austenitizing temperature is higher than a critical temperature, full lath martensite can be obtained in medium and high carbon steel.
钢的含碳量越高，获得全部板条马氏体的临界奥氏体温度越高。
The microstructure of the steel transforms from ferrite plus granular bainite, lath bainite plus lath martensite and then to lath martensite successively with the increasing of cooling rate;
随着冷却速率的增加，实验钢的显微组织由铁素体+粒状贝氏体逐步转变为板条贝氏体+板条马氏体及板条马氏体组织；
The results show that as-annealed microstructure and as-quenched-tempered microstructure of the low carbon high alloy steel added nickel are both single-phase lath martensite.
结果表明：加镍低碳高合金钢无论退火态还是淬火回火态，其组织均为单相板条马氏体；
The results show that as-annealed microstructure and as-quenched-tempered microstructure of the low carbon high alloy steel added nickel are both single-phase lath martensite.
结果表明：加镍低碳高合金钢无论退火态还是淬火回火态，其组织均为单相板条马氏体；
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